如何判断一个应用程序是MDI还是SDI

Question

我想监控一些应用程序，如何知道他们是MDI还是SDI，例如firefox 和 visual studio

Answer 1

如果是.NET 的 可以通过实例句柄来判断..非.NET的使用API 参考     public class Class1
        {
            private delegate bool EnumWindowsProc(IntPtr p_Handle, int p_Param);            [DllImport("user32.dll")]
            private static extern int EnumChildWindows(IntPtr hWndParent, EnumWindowsProc ewp, int lParam);            [DllImport("user32.dll")]
            private static extern int EnumWindows(EnumWindowsProc ewp, int lParam);            [DllImport("User32.dll", CharSet = CharSet.Auto)]
            private static extern int GetClassName(IntPtr hWnd, out STRINGBUFFER ClassName, int nMaxCount);            [DllImport("user32.dll", SetLastError = true)]
            private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);            [DllImport("user32.dll")]
            private static extern bool IsWindowVisible(IntPtr hWnd);
            [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
            private struct STRINGBUFFER
            {
                [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 512)]
                public string szText;
            }
            private static IList<IntPtr> m_WindowsList;
            private static IntPtr m_Statusbar;            private static bool m_IsMdi = false;      
            /// <summary>
            /// 获取所有窗体
            /// </summary>
            /// <returns></returns>
            public static Dictionary<IntPtr, string> LoadWindows()
            {
                m_WindowsList = new List<IntPtr>();
                m_Statusbar = FindWindow("Shell_TrayWnd", "");
                EnumWindowsProc _EunmWindows = new EnumWindowsProc(NetEnumWindows);
                EnumWindows(_EunmWindows, 0);                Dictionary<IntPtr, string> _Return = new Dictionary<IntPtr, string>();
                EnumWindowsProc _EunmControl = new EnumWindowsProc(NetEnumControl);
                foreach (IntPtr _Windows in m_WindowsList)
                {
                    m_IsMdi = false;
                    EnumChildWindows(_Windows, _EunmControl, 0);                    if (m_IsMdi)
                    {
                        _Return.Add(_Windows, "MDI");
                    }
                    else
                    {
                        _Return.Add(_Windows, "SDI");
                    }
                }
                return _Return;
            }            
            private static bool NetEnumWindows(IntPtr p_Handle, int p_Param)
            {
                if (!IsWindowVisible(p_Handle))return true;
                if (p_Handle == m_Statusbar) return true;
                m_WindowsList.Add(p_Handle);
                return true;
            }            private static bool NetEnumControl(IntPtr p_Handle, int p_Param)
            {
                STRINGBUFFER _ClassName = new STRINGBUFFER();
                GetClassName(p_Handle, out _ClassName, 255);
                if (_ClassName.szText == "MDIClient")
                {
                    m_IsMdi = true;
                }
                return true;
            }
        }